Table 3 Contact angle values of different fluids with each tested rock sample.

From: Enhanced oil recovery from sandstone reservoir using cationic hyperbranched polyamidoamine dendrimer surfactant flooding under real reservoir conditions

Tested sample

Fm. water

Crude oil

Surfactant slug

L°

R°

Av°

L°

R°

Av°

L°

R°

Av°

A

89.5

89.49

89.50

60.79

60.72

60.75

20.75

21.34

21.04

B

87.74

88.39

88.07

66.56

67.44

67

9.85

11.89

10.87

C

90.47

91.04

90.76

63.29

59.36

61.32

34.92

34.22

34.57

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